Warping apparatus



Sept. 12, 1939. a. A. PETERSON ET AL WAHPING APPARATUS Filed Oct. 14,1935 4 Sheets-5heet 1 c INV NTORS A I 6 Burt 6'. Peterson Bron/(s I Mag;e l/us A ORNEYS Sept. 12, 1939- B. A. PETERSON ET AL WARPING APPARATUSFiled Oct. 14, 1935 4 Sheets-Sheet 2 INVENTORS Burt .4. Pet arsonBrae/fa Marc el/us A ORNEYS Sept. 12, 1939.

B. A. PETERSON ET AL 2,172,850

WARP ING APPARATUS 4 Sheets-Sheet 3 Filed Oct. 14, 1935 r I l \lll c3 xmNA Qm wm T u k. m

H E V U a M A Q NVENTORS Burt :4. Peterson Brooks Marc: l/us BY $446.My. W

A ORNEYS ep 12 1939- B. A. PETERSON E M. 2,172.8s0

WARPIHG AFPARATUS Filed on. 14, 1935 4 Sheets-$heat 4 Zia. 6.

STOPPED Posmolv A CCELERATING POSITION .55 fl a5 5 PL9. 10. flu/ww/vsPOSITION INVENTORS Bur-t 14. Peterson Brae/(a Marcel/us ATTORN SPatented Sept. 12, 1939 waarmo Burt A. Peterson and ford, IlL, designersto AP TARATUS emu mam. noct- Barber-Colman Company,

Rockford, 11L, a corporation)! Illinois Application October 14. 1935,Serial No. 44,932

This invention relates to warping apparatus, 1. e., to apparatus forsimultaneously rewinding the yarn of a considerable number of supplyyarn masses onto a single relatively large container. Such an apparatuscomprises a creel for supporting the supply yarn masses and a warper forsupporting and rotating the receiving container or warp beam. Theinvention has special applicabillty to warping apparatus that isintended to run at high speed, e. 8., approximately one thousand yardsper minute, as the desirability of rapidly accelerating the warp beamupon starting the apparatus and the necessity of promptly stopping therotation of the warp beam upon the breakage or undue slackening of ayarn have created problems that were difficult of solution. In thisconnection it may be pointed out that with a broken thread-end travelingat the rate of about one thousand yards per minute it is essential tostop the warp beam promptly, lest the threadend become wound upon thebeam and covered with windings of yarn so that it cannot be found andtied to the broken end on the supply yarn mass. The application of thenecessary braking force to the heavy winding drum and the warp beam tocause prompt stoppage, without pro ducing destructive stresses, is oneof the problems to which the present invention is directed.

The invention is in the nature of an improvement upon the warpingapparatus disclosed in the Peterson Patents Nos. 1,780,318 and1,872,179, particular reference being made to Fig. 6 of thefirst-mentioned patent and Figs. 1 and 2 of the second. As shown inthose patents, the warper was driven from a belt pulley through a mechanically operated clutch and was stopped by means of a mechanicallyoperated brake. The mechanism required for the proper acceleration anddeceleration of the warp beam was relatively complicated and subject toexcessive wear and breakage.

The general object of the present invention is to obtain rapid,controlled acceleration and deceleration with reduced liability to wearand breakage; and this object has been attained, in part, by thesubstitutionfanfar as possible, of electrical apparatus for themechanism of the prior art.

In the accompanying drawings Figure l is a plan view of a. warpingapparatus embodying the features of this invention, the rear part of thecreel being broken away.

Fig. 2 is a horizontal sectional view taken along the axis of thefriction drum that supports and rotates the warp beam.

Fig. 3 is a fragmental sectional view of the brake and clutch.

Figs. 4. 5 and 6 are the control bar therefor.

views of one of the "drop wires" or "detectors located on the creel, and

Fig. i is a diagram showing the mechanism and electric circuits throughapparatus is controlled, sho

which the warping wing the condition of the apparatus after it has beenstopped through the dropping of a of the warper clock. The drop wiresare in the illustrate first or drag position cam shaft is in the rest,as in Fig. 8.

Figs. 8, 9 and 1 positions of the cams d in Fig. 4, and the resetstopped position of Fig. 11 is a fragmented view of the rock shaft andconnections that control In Fig. l, A denotes the Warner, C a warp beammounted in the warper.

Warper base i and two side frames 2 and 3.

the drop wires.

B the creel, and

rper A comprises a Rotatably mounted in bearings attached to the sideframes.

is a shaft 4 (Fig. 2). drum 5 that supports warp beam C. The meansincludes a pulley i rotatab right-hand end 0 being interposed between ofthe pulley. pulley i from a pulley an electric motor l0.

tinuously while the motor lli is transmitted from shaft 1 through amagnetic clutch II which may be of 8 (Fig i the shaft I, ball the shaftand the hub Belts I communicate To this shaft is fixed a andfrictionally drives the for driving the drum ly supported on the powerto the l) on the shaft of The pulley i revolves conis running. Power thepulley 6 to the drum ally-actuated friction any preferred construction,as, for example, of the type disclosed in Warner Patent No. 1934. Hereinthe a clutch drum l2 rigi 1,981,208, dated Nov. 20, clutch is shown ascomprising dly secured to the outer end of the shaft 4 and having aninternal clutch or friction surface II arranged an expanslbleclutch-band ll lar electromagnet for engagement by. (Fig.3). Anannuii issupported on the pulley 6, for a slight amount of rotation relativetothe pulley. A slip ring of conve ducts current to the magnet.

ed to attract an arma nected to the clutch nected to end brackets ll oftends to contract the clutchend brackets I8 is an a ,6. Lugs 20 on themagnet drum l2.

ntional design con- The latter is adaptture ring l6 rigidly con- Aspring i1 boilthe clutch-band ll band. Between the butment ill on thepulley ii are arranged to bearings I a drop wire or through the action10 abut against surfaces of the end brackets l8 0! the clutch-band, thespring ll holding said surfaces against said lugs when the magnet is notenergized. When the magnet is energized, it attracts the armature ringl6 which is fixed to the drum I2 and hence to the shaft 4. The magnetand the clutch-band are thus caused to lag as the pulley 6 revolves,whereby the abutment l9 and one of the lugs 20 act to spread apart theends of the band and thereby cause the pulley 6 and the drum I! to befrictionally clutched together. It will be noted that the clutch justdescribed applies power to the drum shaft 4 as directly as possible.

The means for promptly arresting rotation of the drum 5 comprises amagnetically operated friction brake 2| which is similar to the clutchH, and hence need not be described in detail. 22 is a brake drum rigidlysecured to the lefthand end of the drum 5, and 23 is a brake bandconnected to the side frame 3 and arranged to be expanded intofrictional engagement with the internal surface of the drum 22 by meansincluding an electromagnet 24 mounted on the side frame. that thebraking torque is applied directly to the drum 5 and is not transmittedthrough a shaft or keys.

Creel The creel B may be of any desired form. Herein I have shown acreel generally similar to the one disclosed in the before-mentionedPeterson patents and comprising two the opposite stitute a V-shapedstructure. The supply yarn masses or "cheeses a are non-rotatablysupported in the creel frame for the drawing of the yarn off the ends ofthe cheeses. The drop wires construction is shown in Figs. 4, 5 and 6.

Each drop wire consists of a piece of wire bent to form a yarn-guidingarm 26 and a horizontal pivot 21 which is grounded as indicated in Fig.'1.

ward to the warper; and to free the drop wires, as shown in Fig. 6, sothat they shall be held up after the warper has been ed to, engage thecontact arm 28 and an arm 32 fixed to the pivot 21. The control bars 30are connected for simultaneous movement through lustrated in Fig. 6, thestopped position represented in Fig. 4, and the rethreading position 11Fig. 5. The means for causing the control bars to assume these positionscomprises a bell crank connected to the bar 34 38 connecting the bellcrank 35 to an arm 37. Said arm is fixed on a shaft 38 and is rigid withan arm 39 (Fig. 11). The latter is arranged to be operated automaticallyto produce the control through a. hand lever 40 pivoted in the warperframe in position for access by the operator while standing in front ofthe warper see Fig. 1).

An arm is loosely mounted on the shaft 38 and has a releasableconnection with the arm 38.

The parts are so proportioned that when the hand lever 40 is pulledforward, the cam will engage the arm 49 and throw out the latch 46before the rear end wall of the opening 45 engages the pin 42, afterwhich continuing forelectric motor 58 (Fig, 7) through the train 51, 58,59, 60, GI, 82 and 63.

Thread roll and its brake The severalhundred yarns extend from the dropwires to a thread roll 64 (Figs. 1 and 7) and carrying brake beingapplied by a spring 66 and withdrawn by a cam 61 on the reset cam shaft55. The connection between the brake and the cam General description ofelectric circuits and resetting mechanism Before describing moreparticularly the electric circuits and the manual control is effectedaisacso nets I5 and 24 for the clutch Ii and the brake 2!, respectively,are operated on a low voltage direct nating current line through the useof a former H and a dry-plate rectifier 12 It may also be stated thatthe reset makes one revolution per cycle of operation, but in threesteps, the shaft thus having three rest positions. To move from one restposition to the next it is, of course, necessary to start the motor 56.These three rest positions of the cam shaft 55 are illustrated in Figs.8, 9 and 10.

Fig. 8 shows the first or stopped position", which is the position takenby the cam shaft 55 when the warper is stopped. In going to thisposition the double cam 53-54 lifts the control bars to their highestposition, as shown in Fig. 4, wherein the drop wi a caused to place adrag on that portion of the yarn which extends between the drop wiresand ihe warper. The drop wire circuit and the circuit of the motor thatdrives the cam shaft also are opened.

In going from the stopped position to the second or acceleratingposition" the warper is started. The cam shaft 55 halts in theaccelerating position until the warpcr has been accelerated to a speedgreat enough to place sufficient tension on the yarn to hold up the dropwires. When this speed has been attained, a centrifru gally-actuatedswitch 13 (Fig. 7) closes a circuit that again starts the cam shaft 55in rotation. The switch 13 may be of any preferred type. and isresponsive to the speed of the drum 5, the switch contacts being openwhen the warper is stopped and being closed when a. certain speed isattained.

While turning from the accelerating position to the third or runningposition, the shaft 55 lowers the control bars 30 to the position shownin Fig. 6, wherein the drag is removed from the yarn and the drop wiresfreed so that they are held elevated by the running yarn, whereupon a.controlling switch in the drop wire circuit is closed so that thefalling of a drop wire shall complete that circuit; and the circuit ofthe speed-responsive switch is opened.

Restarting after stoppage through action of drop wire The diagram, Fig.'7, represents the condition of the apparatus when the warper is at restafter having been automatically stopped by reason of the breakage orexcessive slackness of a yarn. The circuit through the clutch magnet 15is open. but the circuit through the brake magnet 24 is complete, asfollows: transformer ll, rectifier l2. wire I8, normally closed switchl9, wire an, non mally closed contacts 13* of a reiay 13 is rheostat 13magnet 24 and wire '13 to gr The operator finds the broken end on the hm and draws forward to the warper the broken end attached to the cheese.After iecing up the broken yam, the operator [JiPSse lever i l on thewarper, thereby closing switch i5, and core pleting a circuit to groundthrough wire i5 coil of a reset relay [1, and wire 84 to lin Theenergization of the reset rel causes the lower set of contacts iii toclo by completing a circuit through the I re. 56 as follows: contacts8%, wires 32 and 56, and wire 84 to linev The lever i l in helddepressed long enough to permit shaft 55 to revolve sufficiently toclof. 85 through the action of a. cam 85 on after which the lever 'l lmay be rrlra.

opening of the switch 15 deenergizes the relay il but the closing of theswitch 85 maintains a cir cult through the reset motor 56 as follows:wires 3? and 8E. switch 35, wires 82 and 83, motor 55 and wire 34 toline. When the cam 36 reaches the position shown in Fig. 9, the switch85 opens, whereupon the motor stops with the reset cam shaft 55 in thesecond or accelerating position. The rotation of the cam shaft hascaused the thread roll brake 65 to be released.

in going from the first or stopped position (Fig. 8) to the second oraccelerating position (Fig. 9), a cam 89 on the shaft 55 closes a switch90, thereby establishing a hircuit as follows: wires 81 and 5!. switch56. wire 92, normally closed contacts 93 of the reset relay 17, wires 94and 95, coil of brake and clutch relay 13 and wire 91 to line.

The cnergization of the coil of the relay 13 opens the switch 13* of thebrake circuit and closes a switch 58, thereby establishing a circuitthrough the ciutch magnet l5 as follows: trans former ll, rectifier 12,wire 18, switch 19, wire 86, switch 98, wire Q9, rheostat llli'i, wirelill, magnet 15 to ground, thus causing the warp beam to be revolved.

When moving from the first to the second position of rest. a cam IE2 onthe shaft 55 closes a switch ass, thereby closing at that point acircult through the reset motor 56 which is completed as soon as thewarp beam has been sufficiently accelerated to hold up the drop wires,as follows: wire Bfi, motor 56, wires 83, B2 and E85. switch Hi3, wireI05, switch 13, and wire in. to ground, thereby restarting the motor 56.

In the turning of the shaft 55 from the second or accelerating positionto the third or running position, the switch 90 remains closed, thuskeeping the clutch circuit closed and the brake circuit open; the cam53--54 lowers the control bars 30. thus removing the drag on the yarnand freeing the drop wires so that they may thereafter he held up by theyarn; and a switch I8 is closed by a cam me on the shaft 55. The closingof the switch 108 supplies current to the conductors 29. through a wirelllLso that if any drop wire shall fall, a circuit shall be closed tostop the warpcr, and also supplies current to a circuit through wirc HIthat includes a warper clock H2 so that the warper shall be stopped uponthe completion of the beam.

As the shaft 55 reaches the third or running position, the swit h IE3 isopened, thereby opening the circu o the motor as, whereupon the shaft 55cornea to rest in the running position shown in Fig. 1D.

will hr n ihai the setting of the warp pend nt upon closing oi d thisoccurs while the cam from the first to the second stoppage of the beam,however,

on; applied the direct rc- 1 circuit, as will presently using effectedpromptly.

w ong-.- when of a drop wi e or for:

clock or undue LS1LCRDE" on wire complcirn-v :igc ndlng oilon sho t 2?,contour.

'r i l um lo llliil. Tin

.j cl'vl'ilficls 93 luv-nits which in turn opvi'l the brake cucu'i,

thus promptly stopping the beam. The energizetion of the relay II alsocloses a holding circuit through the relay as follows: wires 81 and GI,switch 90, wires 92 and III, contacts III. wires H5 and I6, coil ofrelay II-and wire 84 to line. The energization of the relay 11 alsocloses the contacts BI, whereby a circuit is closed through the motor 56m follows: wires 82 and 83, motor 56, and wire 84 to line. The shaft 55thereupon moves from the third or running position to the first orstopped position, which causes the cam 53-54 to lift the control bars 30so as to place the drop wires in drag position (Fig. 4); opens the dropwire circuit through the opening 0! switch I08; and opens the circuit ofmotor 56 through the opening of switch 80. After correcting the troublethat caused closing of the drop wire circuit, the operator restarts theapparatus as before described.

Completion of the beam causes stoppage as in the event of drop wireoperation.

Stopping at will from high speed When the apparatus is running at highspeed. with the reset cam shaft 55 in the third or running position,stoppage may be effected at will by depressing the lever I4. Thiscompletes a circuit through the coil of reset relay H, as described inconnection with starting, which, in turn, opens the circuit of the relay13b at the contacts 93 (thereby causing release of the clutch andapplication of the brake), and completes a circuit through the motor 56,thereby causing the cam shaft 55 to be turned from the third or runningposition to the first or stopped position, and eifectlng stoppage of theapparatus as de scribed in connection with the subject of stoppingthrough the action of a drop wire or the clock.

Low-speed rotation of beam When restarting, whether after piecing up asingle yarn or when starting a new beam or at any other time, it isusually desirable to be able to rotate the beam slowly so as to observewhether all of the strands are running properly before inaugurating a.cycle of operation that will bring the warper to full speed. For thispurpose there is provided a normally open switch Iii arranged to beclosed by depression of a pedal III. Closure of the switch I I8completes a circuit through the coil of the brake and clutch relay 13",as described in connection with the subject of restarting after stoppagethrough action of a drop wire, thereby releasing the brake and applyingthe clutch. The pedal is kept depressed long enough to enable theoperator to see that all the strands are running properly, after whichthe pedal is released, and the lever H depressed to start a cycle ofoperations of the reset cam shaft 55 from the first to the second andthen to the third rest position.

Brake for reset motor 58 armature of which coil is connected to a bellcrank lever I24 to slacken the brake band. As soon as the motor circuitis broken, the spring I20 applies the brake band and prevents overrunthrough momentum.

Beam guard the warper unless the beam guard is in its lower or effectiveposition, means is provided whereby the beam guard controls a switchI28. This switch is associated with the clock H2, and is arranged to beclosed through contact of the beam guard with a cam I26 attached to themovable switch point. When the switch I26- is closed, a circuit isclosed to ground, as when a drop wire falls or the clock operates. Thewarper cannot then be restarted and placed in full speed.

Beam arm safety switch The warp beam C may be supported upon the drivingdrum 5 by any desired means, as, for example, by means of pivoted beamarms as disclosed in the Colman Patent No. 1,366,447. With theconstruction shown in the Colman patent, in order to remove the beamfrom the warper when it is full, it is necessary to raise the beam armsslightly. This additional movement of one of the beam arms is availed oito open the switch 79 in the circuit controlled by the relay 13' so thatif the pedal III were accidentally depressed no current would besupplied to the clutch magnet ii to cause rotation of the drum 5. At thesame time, the circuit of the brake magnet 24 is broken, so that thebeam may be rotated by hand, which is desirable when the new set ofyarns is brought to and wrapped around the beam.

As indicated diagrammatically in Fig. 7, the movable contact of theswitch I9 tends to move away from the other, and is normally kept inclosed position by a spring-actuated detent I2! that normally engages astem I28 connected to the movable contact. A lever I 29 is connected atone end to the detent I21 and is arranged at its other end to be movedto withdraw the detent. A cam I30 mounted on the left-hand beam armbears on the lever I28. When said arm is raised to permit removal of thefull beam, the cam I30 trips the detent I21 and allows the switch I! toopen. The cam I30 is so adjusted on the beam arm that when the beam isfull any further upward movement of the beam arm will cause tripping ofthe detent. When starting up a new beam the operator closes the switchI9 by pushing the stem I28 inwardly.

Stopping warper at any time before the high speed or running position iFig. 10) is reached To stop the warper it is necessary to deenergize therelay 13'. This, in turn, requires energization of the relay TI to openthe contacts 33, which may be done by depressing the lever I4, as whenstarting. If, therefore, the warper is running, but the cam shaft hasnot yet reached the third or running position, depression of the lever14 will cause throwing out of the clutch and application of the brake.The en ergization of the relay 11 also closes the holding circuit 8],9i, 90,92, H3, H4, H5, so that the relay 'l'l remains energized duringthe interval between the closing of the switches 90 (Pig. 9) and I08(Fig. 10); consequently the motor circuit ll, 82, 83, 56 and 84 ismaintained closed, and the cam shaft 55 runs through the second andthird rest positions without stopping until it reaches the first orstopped position. All of the cam-actuated switches Hi8, H13, 85 and Sllare then open (see Fig. 8), the opening of the switch 90 causinginterruption of the holding circuit, with consequent deenergization orthe relay" and hence opening of the motor circuit at the contacts 8|.

Starting a new beam Before drawing forward the new yarns to the warper,the operator pulls the lever 40, thereby freeing the control bars 30from the control of the cam 53-54 and lowering said bars to their lowestposition, as shown in Fig; 5, whereby all of the drop wires are broughtinto the position illustrated in that View and held there. After theyarns have been connected to the beam, the beam guard is lowered, thesafety switchJB is closed, and the lever 40 operated to raise thecontrol bars 30 to the position shown in Fig. 4 and return them to thecontrol of the cam 53- -54. The beam may then be slowly rotated by useoi the pedal H1 until all the threads are seen to be running properly,after which the warper may be started as before described.

It will be evident from the foregoing description of the presentembodiment of the invention that means has been provided whereby theapparatus may be put through a definite starting cycle in which the warpbeam is rapidly ac= celerated, the drop wires being rendered ineifectiveuntil the beam has been sufficiently accelerated, and whereby sufiicientbraking power may be applied to produce very prompt stoppage of the beamwithout setting up destructive stresses.

While the construction shown in the drawings has been described inconsiderable detail, it should be understood that the invention is notlimited to the arrangements shown, except as indicated in the appendedclaims.

In certain of the claims the expression a stopping circuit has been usedto denote the drop wire circuit H0, the warper clock circuit ill or anequivalent circuit. In certain claims the term. manua has been employedto refer to the hand lever 14 or the pedal H1, or an equivalent meansoperated by the operator.

We claim as our invention:

1. A warping apparatus having, in combination, a. creel for the supplyyarn masses, a circuit containing a set of drop wires for the yarns fromsaid supply masses, means to place the drop wires in position to place adrag on the yarns and to remove them from such position, means forrotating a warp beam to which said yarns extend, a reset motor foractuating said drop wire means to remove the drop wires from dragposition, means to start the reset motor, means actuated by the resetmotor for starting the beam-rotating means, means actuated by the re setmotor for stopping said motor, a circuit containing means responsive toacceleration of the beam for restarting the reset motor to actuate saiddrop wire means to remove the drop wires from drag position, to closethe drop wire circuit, and to open the second mentioned circuit.

2. A warping apparatus having, in combine.

tion, a creel for the supply yarn masses, a circuit including a set ofdrop wires for the yarns from said supply masses, said drop wires beingarranged to ground said circuit, means for rotating a warp beam to whichsaid yarns extend, said beam-rotating means being arranged to be stoppedthrough grounding of said circuit, a eset motor arranged to be startedthrough the grounding of the drop wire circu t, means driven by thereset motor for placing the drop wires in position to place a drag onthe yarn's, and means driven by the reset motor for stopping said motor.

3. A warping apparatus having, in combination, means for rotating 2.warp beam, a clutch and a brake for said beam-rotating means, a circuitfor the clutch, a circuit for the brake, a warper relay for opening oneand closing the other of said circuits, a circuit for the warper relay,a switch in the warper relay circuit, a .reset motor, a circuit for themotor, a switch in the motor circuit, a circuit-close: responsive to thespeed of the beam, said circuit-closer being in a branch of the motorcircuit, a switch in said branch, a reset relay for alternately closingthe motor circuit and opening the warper relay circuit, a stoppingcircuit connected to the reset relay, a switch in the stopping circuit,and means driven by the motor for operating said switches in thefollowing order: close motor circuit switch, close the warper relayswitch, close the switch in the circuit-closer branch circuit, open themotor circuit switch, close the stopping circuit switch and open theswitch in the circuit-closer branch circuit.

4. A warping apparatus having, in combination, means for rotating a warpbeam, a clutch and a brake for said beam-rotating means, a circuit forthe clutch, a circuit for the brake, a warper relay for opening eitherone and closing the other of said circuits, a circuit for the warpe':relay, a switch in the warpcr relay circuit, a reset motor, a circuitfor the motor, a switch in the motor circuit, a circuit-closerresponsive to the spoof. of the beam. said circuit closer being in abranch of the motor circuit, a switch in said branch a reset relay foralternately closing the motor circuit and opening the warper relaycircuit, a stopping circuit connected to the reset relay, a switch inthe stopping circuit. and a. shaft driven by the motor for operatiogsaid switches through a cycle of operation in a single revolution of theshaft, said shaft he iree positions all rest and being arranged o atethe switch: in the following order: close motor circuit so. i, close thewarper relay switch, close the sw tch in the circuit-closer mph circuit,and open the motor circuit switch while moving from the first to thesecond rest position, and close the drop wire circuit switch and openthe switch in the circuit-closer branch circ alt while moving from thesecond to the third rest position, and open the switch in the stoppingcircuit and the switch in the warper relay circuit while moving from thethird to the first rest position.

A warper having, in combination, a fricdrum for rotating a warp beam, ashaft for d drum, a clutch on said shaft for driving said a brake actingdirectly on said drum for gaping the drum, a relay tending to energize t1 brake and dc-energize the clutch, a circuit for said relay, :1 switchin said circuit, a reset motor, a cam driven by the reset motor foropening and closing said switch, and manually operable mains to startthe reset motor.

s rmsso apparatus having, in combinaon drum for rotating 3. warp beam,

said electromagnetic means, a switch in the circult-closer circuit,manually operable means for starting the reset motor, and means drivenby the reset motor for closing said switches in the order stated and forthen opening the switch in 5 the reset motor circuit.

BURT A, PETERSON. BROOKS MARCELLUS.

CERTIFICATE OF CORRECTION.

Patent No, 2,172,850.

September 12, 1959.

BURT A. PEIERSON, ET AL. it hereby certified. that error appears in theprinted specification of the above numbered patent requiring correctionas follows: Page 1, first matters line 51, for the patent number"1,780,518" Patent should be read with this to the record of the case insealed this 10th day of October, A. D. 1959.

read 1,790,518,- and that correction therein that the Patent Office.

Henry Van Arsdale, Acting Commissioner of Patents.

s rmsso apparatus having, in combinaon drum for rotating 3. warp beam,

said electromagnetic means, a switch in the circult-closer circuit,manually operable means for starting the reset motor, and means drivenby the reset motor for closing said switches in the order stated and forthen opening the switch in 5 the reset motor circuit.

BURT A, PETERSON. BROOKS MARCELLUS.

CERTIFICATE OF CORRECTION.

Patent No, 2,172,850.

September 12, 1959.

BURT A. PEIERSON, ET AL. it hereby certified. that error appears in theprinted specification of the above numbered patent requiring correctionas follows: Page 1, first matters line 51, for the patent number"1,780,518" Patent should be read with this to the record of the case insealed this 10th day of October, A. D. 1959.

read 1,790,518,- and that correction therein that the Patent Office.

Henry Van Arsdale, Acting Commissioner of Patents.

